Index Catalog // ScholarsArchive@OSU

Regional gradient analysis and spatial pattern of woody plant communities in Oregon

Creator:: Ohmann, Janet L.
Abstract:: Knowledge of regional-scale patterns of plant community structure and controlling factors is largely qualitative and based on numerous local studies. Data from a subsample of 10,000 field plots were used to quantify and map compositional gradients of woody plant communities across Oregon forests. Canonical correspondence analyses explained 9-14% of the...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Janet L. Ohmann for the

Predictive mapping of forest composition and structure with direct gradient analysis and nearest-neighbor imputation in coastal Oregon, U.S.A.

Creator:: Ohmann, Janet L. and Gregory, Matthew J.
Abstract:: Spatially explicit information on the species composition and structure of forest vegetation is needed at broad spatial scales for natural resource policy analysis and ecological research. We present a method for predictive vegetation mapping that applies direct gradient analysis and nearest-neighbor imputation to ascribe detailed ground attributes of vegetation to...
Resource Type:: Article
Full Text:: gradient analysis and nearest- neighbor imputation in coastal Oregon, U.S.A. Janet L. Ohmann and Matthew J

Port-orford-cedar : (Chamaecyparis lawsoniana (A. Murr.) Parl.)

Creator:: Ohmann, Janet L. and United States. Forest Service
Resource Type:: Technical Report
Full Text:: .) Pari.) Janet L. Ohman& Distribution Port-Orford-cedar's natural range is restricted to the

Bioindication of air quality in forests of northern and central California using epiphytic macrolichen communities

Creator:: Jovan, Sarah
Abstract:: The unifying purpose of this dissertation was to describe, model, and map relationships between epiphvtic macrolichen communities and air quality in Ibrests of northern and central California. First, multivariate analyses were used to subdivide the large study area into three model areas with similar climate, topography, and lichen communities: the...
Resource Type:: Dissertation
Full Text:: nieiiibet's, Pat Muir, Mary Santelmann, Janet Ohmann. and Richard Dick. for their support and encouragement

Lichen response to the environment and forest structure in the western Cascades of Oregon

Creator:: Martin, Erin P.
Abstract:: Lichens are an important part of the biota in western Oregon forests, where they perform valuable ecological roles and contribute significantly to biodiversity. Lichens in western Oregon are threatened by a number of factors including air pollution and land use practices. If we wish to maintain the persistence of lichens...
Resource Type:: Dissertation
Full Text:: . Bruce McCune, Dr. Patricia Muir, Dr. Janet Ohmann, Dr. Alix Gitelman, and Dr. Alan Bakalinsky. When I

Scale considerations for integrating forest inventory plot data and satellite image data for regional forest mapping

Creator:: Ohmann, Janet L., Gregory, Matthew J., and Roberts, Heather M.
Abstract:: The integration of satellite image data with forest inventory plot data is a popular approach for mapping forest vegetation over large regions. Several methodological choices regarding spatial scale, mostly related to spatial resolution or grain, can profoundly influence forest maps developed from plot and imagery data. Yet often the consequences...
Resource Type:: Article
Full Text:: Janet L. Ohmann a,⁎, Matthew J. Gregory b, Heather M. Roberts b a Pacific Northwest Research Station

HendersonEmilieInstituteNaturalResourcesSpeciesDistribution.pdf

Creator:: Henderson, Emilie B., Ohmann, Janet L., Gregory, Matthew J., Roberts, Heather M., and Zald, Harold
Abstract:: AIM: Landscape management and conservation planning require maps of vegetation composition and structure over large regions. Species distribution models (SDMs) are often used for individual species, but projects mapping multiple species are rarer. We compare maps of plant community composition assembled by stacking results from many SDMs with multivariate maps...
Full Text:: , Janet L. Ohmann, Matthew J. Gregory, Heather M. Roberts & Harold Zald Keywords Nearest-neighbor

HendersonEmilieInstituteNaturalResourcesSpeciesDistribution_AppendixS1.pdf

Creator:: Henderson, Emilie B., Ohmann, Janet L., Gregory, Matthew J., Roberts, Heather M., and Zald, Harold
Abstract:: AIM: Landscape management and conservation planning require maps of vegetation composition and structure over large regions. Species distribution models (SDMs) are often used for individual species, but projects mapping multiple species are rarer. We compare maps of plant community composition assembled by stacking results from many SDMs with multivariate maps...

Species distribution modelling for plant communities: stacked single species or multivariate modelling approaches?

Creator:: Henderson, Emilie B., Ohmann, Janet L., Gregory, Matthew J., Roberts, Heather M., and Zald, Harold
Abstract:: AIM: Landscape management and conservation planning require maps of vegetation composition and structure over large regions. Species distribution models (SDMs) are often used for individual species, but projects mapping multiple species are rarer. We compare maps of plant community composition assembled by stacking results from many SDMs with multivariate maps...
Resource Type:: Article

Asymptotic height-diameter equations for twenty-four tree species in western Oregon

Creator:: Garman, Steven L. (Steven Lee), 1955-, Acker, Steven A., Ohmann, Janet L., Spies, Thomas A. (Thomas Allen), and Oregon State University. Forest Research Laboratory
Abstract:: Equations for predicting height from diameter outside bark at breast height (DBH) were generated for 24 tree species in western Oregon. The equations were based on the asymptotic Chapman-Richards function. Because geographic location and site productivity may influence height-diameter relationships, height-diameter measures from 8727 plots were first grouped by site...
Resource Type:: Technical Report
Full Text:: -FOUR TREE SPECIES IN WESTERN OREGON by Steven L. Garman Steven A. Acker Janet L. Ohmann Thomas A

ScholarsArchive@OSU

Regional gradient analysis and spatial pattern of woody plant communities in Oregon

Predictive mapping of forest composition and structure with direct gradient analysis and nearest-neighbor imputation in coastal Oregon, U.S.A.

Port-orford-cedar : (Chamaecyparis lawsoniana (A. Murr.) Parl.)

Bioindication of air quality in forests of northern and central California using epiphytic macrolichen communities

Lichen response to the environment and forest structure in the western Cascades of Oregon

Scale considerations for integrating forest inventory plot data and satellite image data for regional forest mapping

HendersonEmilieInstituteNaturalResourcesSpeciesDistribution.pdf

HendersonEmilieInstituteNaturalResourcesSpeciesDistribution_AppendixS1.pdf

Species distribution modelling for plant communities: stacked single species or multivariate modelling approaches?

Asymptotic height-diameter equations for twenty-four tree species in western Oregon

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Conference Name

Conference Section/Track

Creator

Contributor

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Location

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search